<template>
    <div class="star" :class="starType">
      <span v-for="itemClass in itemClasses" :class="itemClass" class="star-item" :key="itemClass.id"></span>
    </div>
</template>

<script type="text/ecmascript-6">
  const LENGTH = 5;
  const CLS_ON = 'on';
  const CLS_HALF = 'half';
  const CLS_OFF = 'off';

export default {
  data() {
    return {

    };
  },
  components: {

  },
  props: {
    size: {
      type: Number
    },
    score: {
      type: Number
    }
  },
  computed: {
    starType() {
      return 'star-' + this.size;
    },
    itemClasses() {
      let result = [];
      let score = this.score;
      let hasDecimal = score % 1 !== 0;
      let integer = Math.floor(score) > 5 ? 5 : Math.floor(score);
      for (let i = 0; i < integer; i++) {
        result.push(CLS_ON);
      };
      if (integer < 5 && hasDecimal) result.push(CLS_HALF);
      while (result.length < LENGTH) result.push(CLS_OFF);
      return result;
    }
  }
};
</script>

<style lang="stylus">
   @import '../../common/styles/mixin.styl';

  .star
    font-size 0
    .star-item
      display inline-block
      background-repeat no-repeat
    &.star-48
      .star-item
        width 20px
        height 20px
        margin-right 22px
        background-size 20px 20px
        &:last-child
          margin-right 0
        &.on
          bg-image('star48_on')
        &.half
          bg-image('star48_half')
        &.off
          bg-image('star48_off')
    &.star-36
      .star-item
        width 15px
        height 15px
        margin-right 6px
        background-size 15px 15px
        &:last-child
          margin-right 0
        &.on
          bg-image('star36_on')
        &.half
          bg-image('star36_half')
        &.off
          bg-image('star36_off')
    &.star-24
      .star-item
        width 10px
        height 10px
        margin-right 3px
        background-size 10px 10px
        &:last-child
          margin-right 0
        &.on
          bg-image('star24_on')
        &.half
          bg-image('star24_half')
        &.off
          bg-image('star24_off')
</style>
